<!DOCTYPE html>  
<html>  
<head>  
    <style>  
        table {  
            width: 50%;  
            border-collapse: collapse;  
        }  
        th, td {  
            border: 1px solid black;  
            padding: 4px;  
            text-align: center;  
        }  
    </style>  
</head>  
<body>  
  
    <h2 style="text-align: center;">产品月销量</h2>
  
<table id="salesTable">  
    <tr>  
        <th>ID</th>  
        <th>产品名称</th>  
        <th>销量</th>  
    </tr>  
    <tr>  
        <td>2021090901</td>  
        <td>马克杯</td>  
        <td>5000</td>  
    </tr>  
    <tr>  
        <td>2021090901</td>  
        <td>啤酒杯</td>  
        <td>5200</td>  
    </tr>  
    <tr>  
        <td>2021090901</td>  
        <td>搪瓷杯</td>  
        <td>3500</td>  
    </tr>  
    <tr>  
        <td colspan="2">合计：</td>  
        <td>13700</td>  
    </tr>  
</table>  
  
  
</body>  
</html>